Which glass fills first?

A good puzzle is one that challenges your mind and makes you think carefully before finding the answer.  If you enjoy brain teasers, this puzzle is worth trying.

Can you find the right answer?

In this puzzle you are shown five empty glasses numbered 1 to 5. A network of pipes connects the top of the picture to the glasses below.

The challenge is simple

If water is poured from the top, which glass will fill first?

The pipes form a maze-like pattern, making it difficult to follow the path of the water. You need sharp eyes and good observation skills to solve the puzzle.

Take a close look at the picture and try to find the answer within 20 seconds.

Think carefully before answering

You might think that all five glasses will fill at the same time because water is poured from above.

However that is not the correct answer.

Have you figured it out? Before checking the solution, look at the pipes one more time.

The correct answer

Glass number 4 will fill first.

The reason is simple the pipes leading to the other four glasses are blocked. Water cannot reach those glasses, so only glass number 4 can fill.

This puzzle shows how paying attention to small details can help you solve a tricky problem. Sometimes, the answer is right in front of you you just need to look carefully.